I am just starting out with bash scripting. I tried a simple script to find the area of a square and it didnt run.
Code:
#!/bin/bash
#script to find area of a square based on user input
if [ $# -ne 1 ]
then
echo " Usage -$0 x "
echo " where x is the dimension of the square "
exit 1
n1=$1
echo " Area of the square is equal to `expr $n1 * $n1` "
I know its supposed to be simple but someone shed light on whats wrong.
Hi I just stumbled on to these forums today, and I relatively new to unix. I am trying to figure out how to find the square root of a number using a shell script. I am using bash and I have searched and searched but cannot figure out square roots. Hopefully someone can point me in the right... (3 Replies)
One of the senior administrators gave me a shell script to modify and it begins as follows:
if ] && ]
{more code follows}
Why the double square brackets? (10 Replies)
Hey Guys,
I have a text which has data like this
Taaaa AAA BBB SSSS $ yelpi
Taaaa mmmm kly Tnnnw $ meta
Baaaa Qriek Trieh Mbjsd $ kingsq
....
I need to get an output like this
MAX AAA
TEST BBB
RES SSSS
YUYT test
MED yelpi (0 Replies)
Hi All,
I have a text file which looks like this:
computer programming
systems engineering
I want to get rid of these square brackets and also the text that is inside these brackets. So that my final text file looks like this:
computer programming
systems engineering
I am using... (3 Replies)
Hello all,
I am quite new in this but I need some help to keep going with my analysis.
I am struggling with a short script to read a square matrix and convert it in two collumns.
A B C D
A 0.00 0.06 0.51 0.03
B 0.06 0.00 0.72 0.48
C 0.51 0.72 0.00 ... (7 Replies)
Hello all,
I have the following problem:
$ cat infile
this is spam and i need this too
this is spam and i need this too
$ perl -nwe '$_ =~ /]+ \]+)\]\]*\]? (\+)$/; print "$1 - $2\n";' infile
i need this - too
i need this - and i need this too
I am not sure how many occurences of... (13 Replies)
Dear friend,
I know for a single case, this could be finished quickly with Excel. But if we have hundreds of files, we definitely want to do it with a script or a FORTRAN code. Since I have no knowledge of FORTRAN, I tried to work out a script to do it. The math is very simple. we chose one atom... (4 Replies)
Hi All,
Hope you all are doing good. Yesterday in my project i came across a scenario which i can not guess why it was working in one region and why it was not in another region. Please find my issue below.
I am using AIX version 6.0 of UNIX in my project, in shell scripting i have the... (1 Reply)
Discussion started by: mad man
1 Replies
LEARN ABOUT DEBIAN
mkgeo_grid
mkgeo_grid(1rheolef) rheolef-6.1 mkgeo_grid(1rheolef)NAME
mkgeo_grid -- build a strutured mesh of a parallelotope, in 1d, 2d or 3d
SYNOPSIS
mkgeo_grid options [nx [ny [nz]]]
EXAMPLE
The following command build a triangular based 2d 10x10 grid of the unit square:
mkgeo_grid -t 10 > square-10.geo
geo square-10.geo
or in one comand line:
mkgeo_grid -t 10 | geo -
DESCRIPTION
This command is usefull when testing programs on simple geometries. It avoid the preparation of an input file for a mesh generator. The
optional nx, ny and nz arguments are integer that specifies the subdivision in each direction. By default nx=10, ny=nx and nz=ny. The mesh
files goes on standard output.
The command supports all the possible element types: edges, triangles, rectangles, tetraedra, prisms and hexahedra.
ELEMENT TYPE OPTIONS -e 1d mesh using edges.
-t 2d mesh using triangles.
-q 2d mesh using quadrangles (rectangles).
-T 3d mesh using tetraedra.
-P 3d mesh using prisms.
-H 3d mesh using hexahedra.
THE GEOMETRY
The geometry can be any [a,b] segment, [a,b]x[c,d] rectangle or [a,b]x[c,d]x[f,g] parallelotope. By default a=c=f=0 and b=d=g=1, thus, the
unit boxes are considered. For instance, the following command meshes the [-2,2]x[-1.5, 1.5] rectangle:
mkgeo_grid -t 10 -a -2 -b 2 -c -1.5 -d 1.5 | geo -
-a float
-b float
-c float
-d float
-f float
-g float
BOUNDARY DOMAINS -sides
-nosides
The boundary sides are representd by domains: left, right, top, bottom,front and back.
-boundary
-noboundary
This option defines a domain named boundary that groups all sides. By default, both sides and the whole boundary are defined as
domains:
mkgeo_grid -t 10 > square.geo
geo square.geo
mkgeo_grid -t 10 -nosides > square.geo
geo square.geo
mkgeo_grid -t 10 -noboundary > square.geo
geo square.geo
mkgeo_grid -t 10 -noboundary -nosides > square.geo
geo square.geo
REGIONS -region
-noregion
The whole domain is splitted into two subdomains: east and west, This option is used for testing computations with subdomains (e.g.
transmission problem; see the user manual).
mkgeo_grid -t 10 -region | geo -
CORNERS -corner
-nocorner
The corners (four in 2D and eight in 3D) are defined as OD-domains. This could be usefull for some special boundary conditions.
mkgeo_grid -t 10 -corner | geo -
mkgeo_grid -T 5 -corner | geo -
COORDINATE SYSTEM OPTION
Most of rheolef codes are coordinate-system independant. The coordinate system is specified in the geometry file `.geo'.
-zr
-rz the 2d mesh is axisymmetric: zr (resp. rz) stands when the symmetry is related to the first (resp. second) coordinate.
FILE FORMAT OPTION rheolef-6.1 rheolef-6.1 mkgeo_grid(1rheolef)
07-22-2010
